Annual report [Section 13 and 15(d), not S-K Item 405]

PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Amortization:      
Net periodic benefit cost (credit) $ (247) $ (204) $ (212)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (194)    
Pension Benefits      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 28 31 45
Interest cost 218 235 144
Expected return on plan assets (320) (315) (355)
Amortization:      
Net actuarial loss (gain) (1) 3 13
Prior service costs (credits) 18 18 5
Settlements and special termination benefits (2) (4) (8)
Net periodic benefit cost (credit) (59) (32) (156)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (70)    
OPEB      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 8 10 35
Interest cost 50 64 72
Expected return on plan assets (43) (43) (37)
Amortization:      
Net actuarial loss (gain) (154) (145) (43)
Prior service costs (credits) (15) (17) (3)
Settlements and special termination benefits 2 0 0
Net periodic benefit cost (credit) (152) $ (131) $ 24
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost $ (124)